Organizations have successfully achieved high availability for their digital assets, but are now entering the Speed Epoch where latency has become the new outage. As applications become increasingly complex with distributed architectures, microservices, and cloud deployments, slow performance can be just as detrimental as complete unavailability. Companies like Starbucks, Audi, and Lego have demonstrated that speed of digital delivery is critical to customer experience and competitive advantage. While availability problems can be solved through redundancy and engineering practices, reducing latency requires a fundamental understanding of application performance across complex, distributed systems.